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Documentation > WebObjects 4.5 >
EOInterface Reference
- Inherits
from:
- EOAssociation : EODelayedObserver (EOControl) : NSObject
- Conforms to:
- NSCoding
- (EOAssociation)
- EOObserving (EODelayedObserver)
- NSObject (NSObject)
Declared in: - EOInterface/EOActionInsertionAssociation.h
Class Description
An EOActionInsertionAssociation object inserts objects from
one display group into another.
Usable With |
Any object that responds to setAction:,
typically an NSControl. |
Aspects |
source |
Bound to the EODisplayGroup containing objects to insert.
This aspect doesn't use a key. |
destination |
A relationship of the selected object into which objects
from the source EODisplayGroup are inserted. Usually bound to a
different EODisplayGroup than source. |
enabled |
A boolean attribute of the selected object (usually in
the destination EODisplayGroup), which determines whether the NSControl
is enabled. |
Object Keys Taken |
target |
On receiving an action message from the display object,
an EOActionInsertionAssociation inserts objects from the source
EODisplayGroup into the destination EODisplayGroup. |
Example
Suppose an application shows Talent in one display group and
Movies in another. You want a user to be able to select a talent,
select a movie, and then click an Assign Director button that assigns
the selected talent as one of the movie's directors. To do this,
in Interface Builder, control-drag a connection from the button
to the Talent display group. Select EOActionInsertionAssociation
in the Connections inspector, and double-click the association's source aspect,
binding it to the Talent display group. Similarly, control-drag
a connection from the button to the Movie display group. Select EOActionAssociation
in the Connections inspector, and bind the association's destination aspect
to the "directors" key. Now, when the user clicks the button,
the selected Talent is added to the directors relationship
of the selected Movie. If more than one talent is selected, both
are added to the relationship. If more than one Movie is selected,
the selected talent are added to the relationship of the first Movie
in the selection.